2020 Hyundai Sonata · symptom sheet
Check engine light or misfire
- 25owner reports
- 47,000median miles
- 0involved a crash
Newest report Jul 10, 2026 · checked Sep 9, 2026
111 of the 178 complaints on this car are about the engine. 25 of those describe misfire, which makes it the most reported problem on the 2020 Sonata.
Tick what matches of 25 reports
What got replaced
Owners who name the part that was replaced mention the sensor (3 reports).
Recalls and investigations
2 recalls on the engine cover the 2020 model year. A recall on the same system isn't always the same failure, so read the defect text.
Hyundai Motor America (Hyundai) is recalling certain 2020-2023 Sonata vehicles. A damaged check valve can allow air to enter the fuel tank, causing it to expand and contact hot exhaust components, melting the tank.
Risk and remedy
Remedy: Dealers will inspect and replace the check valve. The fuel tank assembly will be inspected for damage and replaced if necessary. Additionally, dealers will inspect and update the engine control unit software. All repairs will be performed as necessary, free of charge. Owner notification letters were mailed beginning March 13, 2026. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 286. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on November 19, 2025.
Hyundai Motor America (Hyundai) is recalling certain 2020 Nexo and Sonata vehicles. The Remote Smart Parking Assist (RSPA) software may fail to prevent vehicle movement upon detection of an RSPA system malfunction.
Risk and remedy
Remedy: Hyundai will notify owners, and dealers will reprogram the RSPA software, free of charge. The recall began June 3, 2020. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 191.
NHTSA investigations into the engine on the Sonata
Loss of motive power. Closed dec 12, 2023.
NHTSA summary
Engine fires. Closed feb 5, 2024, led to recall 23V-877.
NHTSA summary
Non-crash vehicle fires. Closed dec 22, 2021, led to recall 20V-061.
NHTSA summary
Non-crash vehicle fires. Closed may 10, 2019, led to recall 18V-907.
NHTSA summary
Scope and timeliness. Closed dec 22, 2021, led to recall 17V-226.
NHTSA summary
Charging system failures. Closed oct 31, 1994.
NHTSA summary
When it happens
The middle half of failures fell between 3,500 and 82,000 miles, from the 10 reports that gave a mileage.
What owners wrote
No report on this problem is short enough to quote in full.
Should you keep driving it?
This page can't tell you that. 0 of 25 reports involved a crash. Owners who file are the ones who had a bad experience, and nobody checks their reports. If the problem affects steering, braking, power or a fire risk, treat it as a safety fault and have it inspected before a long or high-speed drive.
File your own report with NHTSA. Complaint counts are how a problem gets an investigation.